/* Window.cpp
Copyright (c) 2008 Michael Zahniser
Please note the license terms (MIT license) at the end of this document.

Function definitions for the Window class.
*/

#include "Window.h"



// SetCaption:
// Set the caption of the window. This should be done before creating it.
void Window::SetCaption(const string &caption)
{
	SDL_WM_SetCaption(caption.c_str(), caption.c_str());
}



// Create:
// Create a window with the given dimensions and flags.
// If the given width and height are both 0, the window will be created full-screen.
void Window::Create(int width, int height, Uint32 flags)
{
	if(!width | !height)
	{
		flags |= SDL_FULLSCREEN;
		SDL_Rect **modes = SDL_ListModes(NULL, flags);
		if(!modes)
			return;
		width = (**modes).w;
		height = (**modes).h;
	}
	this->flags = flags;

	Surface::operator=(SDL_SetVideoMode(width, height, 32, flags));
}



// Resize:
// Resize the window.
void Window::Resize(int width, int height)
{
	// We can't resize a full-screen window.
	if(flags & SDL_FULLSCREEN)
		return;

	if(!*this)
		Create(width, height);
	else if(width != Width() || height != Height())
	{
		// When the window is destroyed, SDL_ResetKeyboard() is called.
		// So, copy the current keyboard state and restore it manually.
		SDLMod mod = SDL_GetModState();
		int keys;
		Uint8 *state = SDL_GetKeyState(&keys);
		Uint8 *stateCopy = new Uint8[keys];
		memcpy(stateCopy, state, keys);
		
		// SDL_ResetKeyboard() generates a key up event for every key that is down.
		// Save it some work by marking all keys as released.
		memset(state, 0, keys);

		Surface::operator=(SDL_SetVideoMode(width, height, 32, flags));

		// Restore the keyboard state that was lost by destroying the old window.
		SDL_SetModState(mod);
		memcpy(state, stateCopy, keys);
		
		delete [] stateCopy;
	}
}



// Update:
// Update the window with whatever drawing has been done.
void Window::Update()
{
	SDL_Flip(data);
}



/* Copyright (c) 2008 Michael Zahniser

Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following
conditions:

The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE. */
